Katz Prospect, Innoko Mining District, Yukon-Koyukuk Census Area, Alaska, USAi

Regional Level Types
Katz Prospect	Prospect
Innoko Mining District	Mining District
Yukon-Koyukuk Census Area	Census Area
Alaska	State
USA	Country

Location: The Katz prospect is on a ridge about 1.2 miles east of Ganes Creek. It is at an elevation of about 1,400 feet near the center of section 21, T. 33 N., R. 38 W., of the Seward Meridian. The prospect (spelled Kaatz) was approximately located and described as locality 13 of Cobb (1972 [MF 363]); also described in Cobb (1976 [OFR 76-576]).
Geology: The Katz (or Kaatz) deposit is a stibnite-quartz-gold vein 4 to 12 inches thick along the footwall of a granite porphyry dike that contains disseminated stibnite and arsenopyrite. The vein strikes N30E and dips 75SE; it is subparallel to the dike. According to Mertie and Harrington (1924), the vein and the associated dike can be traced for about a mile. The Katz lode occurs directly over the projection of the Ganes-Yankee fault and dike swarm (Bundtzen and Laird, 1982; Bundtzen and Miller, 1997). According to Miller, Bundtzen and Gray (2004), grab samples contain up to 1,100 parts per billion (ppb) gold, 2,000 ppb silver, and 35.00 percent antimony. The Katz deposit is similar to the Independence Mine (ID031) and the Goss Gulch deposit (ID039) which also occur along Ganes-Yankee fault and dike swarm (Bundtzen and Miller, 1997).
Workings: The Katz prospect was explored by old trenches and an adit, now caved, probably before 1920.
Age: Undated; probably Late Cretaceous, based on nearby dated intrusions along the Ganes-Yankee Creek fault (Bundtzen and Miller, 1997).
Alteration: Dike is carbonatized and sericitized.

Commodities (Major) - Au, Sb; (Minor) - Ag, As
Development Status: Undetermined.
Deposit Model: Gold-antimony deposit (Berger, 1993) or simple antimony vein (Cox and Singer,

Other Databases

Link to USGS - Alaska:	ID028

Other Regions, Features and Areas containing this locality

References